package com.demo.afternoon;

/**
 * @ClassName TestPC2
 * @Description TODO
 * @Author tianqinglong
 * @Date 20:35 2022/7/14
 * @Version 1.0
 **/

//测试生产者消费者问题2：信号灯法，标志位解决
public class TestPC2 {
    public static void main(String[] args) {
        TV tv = new TV();
        new Player(tv).start();
        new Watcher(tv).start();
    }
}

//生产者--->演员
class Player extends Thread {
    TV tv;

    public Player(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i % 2 == 0) {
                this.tv.play("快乐大本营");
            } else {
                this.tv.play("广告");
            }
        }
    }
}

//消费者--->观众
class Watcher extends Thread {
    TV tv;

    public Watcher(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            this.tv.watch();
        }
    }
}

//产品--->观看
class TV {
    // 演员表演，观众等待 T
    // 观众观看，演员等待 F
    String voice;// 表演的节目
    boolean flag = true;

    // 表演
    public synchronized void play(String voice) {
        if (!flag) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        System.out.println("演员表演了：" + voice);
        // 通知观众观看
        this.notifyAll();
        this.voice = voice;
        this.flag = !flag;
    }

    // 观看
    public synchronized void watch() {
        if (flag) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        System.out.println("观看了:" + voice);
        // 通知演员表演
        this.notifyAll();
        this.flag = !flag;
    }
}

